The Compound by S.A. Bodeen

Eli and his family have lived in the Compound for the past six years, right after a nuclear attack on the United States. There was no time to wait for Gram or for Eddy, Eli's twin brother. Eli's response is to pull back from everyone and try to survive without getting attached to anyone else. They have another 8 years before they can think about leaving.

But things aren't going well. They are running out of food, and Eli can't stomach the idea of his dad's solution. His mom is pregnant again, the vegetable garden is dying, and Eli's dad is acting crazy. Then Eli finds a wireless connection. Soon he questions whether there was an nuclear attack at all--especially when he finds out Eddy is still alive.

Crazy paranoid but fantastic book. I enjoyed the character development and although I'm not surprised at the ending, I thought it worked with the book.